The Roman emperor Constantine made Christianity the official religion in A.D. 313. [Pitts]

A fingerprint of Divinity is seen in this number in that it is a compound of two mirror-image emirps, 31, the Hebrew alpha-numberic value of the name GOD [EL = 1+30], and 13, the prime in the Hebrew name of Jehovah [YHVH = 10+5+6+5 = 26 = 2*13], hence, 31/13 compounded = 313. [Pitts]